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bhyve: implement virtio-9p support

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Recently virtio-9p support was added to bhyve.

On the host side it looks this way:

  bhyve .... -s 25:0,virtio-9p,sharename=/path/to/shared/dir

It could also have ",ro" suffix to make share read-only.

In the Linux guest, this share is mounted with:

  mount -t 9p sharename /mnt/sharename

In the guest user will see the same permissions and ownership
information for this directory as on the host. No uid/gid remapping is
supported, so those could resolve to wrong user or group names.

The same applies to the other side: chowning/chmodding in the guest will
set specified ownership and permissions on the host.

In libvirt domain XML it's modeled using the 'filesystem' element:

  <filesystem type='mount'>
    <source dir='/path/to/shared/dir'/>
    <target dir='sharename'/>
  </filesystem>

Optional 'readonly' sub-element enables read-only mode.

Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Roman Bogorodskiy
2020-10-09 18:46:04 +04:00
parent 7c878cf9a7
commit 7382a7c2be
17 changed files with 308 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.args
+10
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@@ -0,0 +1,10 @@
/usr/sbin/bhyve \
-c 1 \
-m 214 \
-u \
-H \
-P \
-s 0:0,hostbridge \
-s 2:0,ahci,hd:/tmp/freebsd.img \
-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 \
-s 4:0,virtio-9p,/shared/dir=shared_dir,ro bhyve
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.ldargs
+3
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@@ -0,0 +1,3 @@
/usr/sbin/bhyveload \
-m 214 \
-d /tmp/freebsd.img bhyve
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-readonly.xml
+28
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@@ -0,0 +1,28 @@
<domain type='bhyve'>
<name>bhyve</name>
<uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
<memory>219136</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
</os>
<devices>
<disk type='file'>
<driver name='file' type='raw'/>
<source file='/tmp/freebsd.img'/>
<target dev='hda' bus='sata'/>
<address type='drive' controller='0' bus='0' target='2' unit='0'/>
</disk>
<interface type='bridge'>
<mac address='52:54:00:b9:94:02'/>
<model type='virtio'/>
<source bridge="virbr0"/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<filesystem>
<source dir='/shared/dir'/>
<target dir='shared_dir'/>
<readonly/>
</filesystem>
</devices>
</domain>
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-accessmode.xml
+27
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@@ -0,0 +1,27 @@
<domain type='bhyve'>
<name>bhyve</name>
<uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
<memory>219136</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
</os>
<devices>
<disk type='file'>
<driver name='file' type='raw'/>
<source file='/tmp/freebsd.img'/>
<target dev='hda' bus='sata'/>
<address type='drive' controller='0' bus='0' target='2' unit='0'/>
</disk>
<interface type='bridge'>
<mac address='52:54:00:b9:94:02'/>
<model type='virtio'/>
<source bridge="virbr0"/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<filesystem accessmode='mapped'>
<source dir='/shared/dir'/>
<target dir='shared_dir'/>
</filesystem>
</devices>
</domain>
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-driver.xml
+28
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@@ -0,0 +1,28 @@
<domain type='bhyve'>
<name>bhyve</name>
<uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
<memory>219136</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
</os>
<devices>
<disk type='file'>
<driver name='file' type='raw'/>
<source file='/tmp/freebsd.img'/>
<target dev='hda' bus='sata'/>
<address type='drive' controller='0' bus='0' target='2' unit='0'/>
</disk>
<interface type='bridge'>
<mac address='52:54:00:b9:94:02'/>
<model type='virtio'/>
<source bridge="virbr0"/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<filesystem>
<driver type='loop'/>
<source dir='/shared/dir'/>
<target dir='shared_dir'/>
</filesystem>
</devices>
</domain>
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p-unsupported-type.xml
+27
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@@ -0,0 +1,27 @@
<domain type='bhyve'>
<name>bhyve</name>
<uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
<memory>219136</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
</os>
<devices>
<disk type='file'>
<driver name='file' type='raw'/>
<source file='/tmp/freebsd.img'/>
<target dev='hda' bus='sata'/>
<address type='drive' controller='0' bus='0' target='2' unit='0'/>
</disk>
<interface type='bridge'>
<mac address='52:54:00:b9:94:02'/>
<model type='virtio'/>
<source bridge="virbr0"/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<filesystem type='bind'>
<source dir='/shared/dir'/>
<target dir='shared_dir'/>
</filesystem>
</devices>
</domain>
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.args
+10
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@@ -0,0 +1,10 @@
/usr/sbin/bhyve \
-c 1 \
-m 214 \
-u \
-H \
-P \
-s 0:0,hostbridge \
-s 2:0,ahci,hd:/tmp/freebsd.img \
-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 \
-s 4:0,virtio-9p,/shared/dir=shared_dir bhyve
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.ldargs
+3
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@@ -0,0 +1,3 @@
/usr/sbin/bhyveload \
-m 214 \
-d /tmp/freebsd.img bhyve
tests/bhyvexml2argvdata/bhyvexml2argv-fs-9p.xml
+27
View File
@@ -0,0 +1,27 @@
<domain type='bhyve'>
<name>bhyve</name>
<uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
<memory>219136</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
</os>
<devices>
<disk type='file'>
<driver name='file' type='raw'/>
<source file='/tmp/freebsd.img'/>
<target dev='hda' bus='sata'/>
<address type='drive' controller='0' bus='0' target='2' unit='0'/>
</disk>
<interface type='bridge'>
<mac address='52:54:00:b9:94:02'/>
<model type='virtio'/>
<source bridge="virbr0"/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<filesystem>
<source dir='/shared/dir'/>
<target dir='shared_dir'/>
</filesystem>
</devices>
</domain>